Smooth
Posts: 3729
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
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Re: Samyang 8mm Fisheye Canon APS-C
Posted: 30 Apr 2010 at 15:07 GMT
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Adding to this thread....
Dorin asked what if you were to purchase a Nikon mount Samyang and by using an adapter how would it perform on a Canon?
The reason for this? Say you have a class of people/students who do not own a Fisheye lens and maybe cannot afford to purchase one. As a group they could all put in and purchase the one Nikon mount version and share it around between Nikon and Canon users.
I recently purchased a Nikon mount Vivitar 7mm Fisheye (at least this is how it is badged) The reality is, it is a re-styled Samyang 8mm Fisheye (as I have mentioned before, these are all the same lens). Personally I like the Vivitar styling (makes absolutely no difference to functionality).
OK, so I only received this late yesterday from the USA (on forwarded by a friend in Florida) I quickly found the NPP on my Nikon D300s logged the figures and then thought I should give it a go on my trusty old 6.3 Megapixel Canon 10D APS-C DSLR via a Fotodiox Nikon F mount adapter to Canon EOS.
See www.fotodiox.com/catalog/product_info.php?product...
or the Pro version www.fotodiox.com/catalog/product_info.php?product...
It should be noted that Fotodiox quote "Infinity focusing is guaranteed." on both models.
I located the NPP which was 3.5mm different (forward) to the Falcon/Samyang 8mm Fisheye Canon mount on the same camera.
View panorama omnipix.net/knowledge/vivitar_on_canon
As you can see it is closer to 9mm in fullframe mode and 10mm in circular mode (same as the Canon mount Samyang give or take).
For a limited time you can download the images set and .pts file to have a play yourself.
rcpt.yousendit.com/863460201/5a7eb3b76f3450547433...
You can see here because of the offset of the adapter that you do capture a small part of the sunshade (it is of no consequence). If "may" be possible that this occurred because my adapter is modified (from a previous project) so it may or may not be typical.
I'm yet to find the "sweet" hyperfocal point of the lens, but I can say the focus is different to that of the Canon mount version. Is this because of the adapter? Is it because the lens is a different build style? Different mount type? I'm not sure, but it appears to be able to focus just fine and a few shots will find the sweet spot I'm sure.
I hope someone finds this useful.
Regards, Smooth 
www.smooth360.info
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DorinDXN
Posts: 2802
Location: Timisoara, Romania
Registered: 14 Nov 2006
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Re: Samyang 8mm Fisheye Canon APS-C
Posted: 1 May 2010 at 6:42 GMT
updated: 1 May 2010 at 6:42 GMT
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Hi Smooth, you're, as allways, helpful and informative.
Thank you 
Dorin
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PuzzleDreams
Posts: 1
Location: European Union
Registered: 11 May 2010
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Re: Samyang 8mm Fisheye Canon APS-C
Posted: 11 May 2010 at 20:45 GMT
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Guys! I`m trustful that you would help me with my problem. I have a Nikon d5000, a samyang 8mm 3.5 NN3 + rotator RD16 + EZ Leveler 2 + slik d700 dx. I use ptgui for stiching the panoramas. As i read so many times this thread i understood that by not having any communication between body and lens, one should input manually the setting in ptgui for the samyang lens. I only found on this forum for canon. Can someone help me with the figures for nikon (crop sensor)??? I would appreciate that so much!
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bigwade
Posts: 821
Location: Utrecht, Netherlands
Registered: 19 Oct 2005
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Re: Samyang 8mm Fisheye Canon APS-C
Posted: 11 May 2010 at 23:13 GMT
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There's no need for setting the lens values.
Just drop your images in PTGui and if you have made the pano correct, PTGui will calculate the settings.
If you have a standard workflow save those settings.
PTGui tutorials can be found on the web.
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enridp
Posts: 21
Location: Argentina
Registered: 11 Feb 2008
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Re: Samyang 8mm Fisheye Canon APS-C
Posted: 23 Jul 2010 at 9:00 GMT
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is not possible to make a panorama with 3 shots using a sensor with 1.5X and the Samyang (not shaved)?
(I can have a big nadir, like those leaved by Google Street View)
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badders
Posts: 384
Location: East Kilbride, United Kingdom
Registered: 5 Dec 2007
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Nick Fan
[NodalNinja]
Posts: 696
Location: Hong Kong
Registered: 26 May 2006
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Re: Samyang 8mm Fisheye Canon APS-C
Posted: 23 Jul 2010 at 10:09 GMT
updated: 23 Jul 2010 at 10:20 GMT
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enridp said: is not possible to make a panorama with 3 shots using a sensor with 1.5X and the Samyang (not shaved)?
(I can have a big nadir, like those leaved by Google Street View)
It is possible only if you can live with huge zenith and nadir. In fact, you get a cylindrical pano.
Here is how. Buy lens ring for your lens and mount it on Nodal Ninja Ultimate R1/10 with your camera in landscape orientation.
Alternatively, you can mount camera and lens on lower rails of NN3/5/5L.
nick
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enridp
Posts: 21
Location: Argentina
Registered: 11 Feb 2008
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Re: Samyang 8mm Fisheye Canon APS-C
Posted: 25 Jul 2010 at 19:16 GMT
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What would be the size of the nadir with 3 shots (covering the full zenith)?
I'm triyn to deduce it but I don't know how to maximize the coverage of the lenses.
I mean, if you look at Sigma 8mm, you will se its vfov (in landscape) is <120º but you can make a full pano with 3 shots anyway!!
I think Samyang vfov (landscape) is only 102º, dfov 180º, and I don't know hfov...
I want to cover 360H and the maximum ºV (covering the full zenith) with 3 shots. How should I put the camera in every shot?
Thanks!!
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Nick Fan
[NodalNinja]
Posts: 696
Location: Hong Kong
Registered: 26 May 2006
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Re: Samyang 8mm Fisheye Canon APS-C
Posted: 27 Jul 2010 at 5:40 GMT
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enridp said: What would be the size of the nadir with 3 shots (covering the full zenith)?
I'm triyn to deduce it but I don't know how to maximize the coverage of the lenses.
I mean, if you look at Sigma 8mm, you will se its vfov (in landscape) is <120º but you can make a full pano with 3 shots anyway!!
I think Samyang vfov (landscape) is only 102º, dfov 180º, and I don't know hfov...
I want to cover 360H and the maximum ºV (covering the full zenith) with 3 shots. How should I put the camera in every shot?
Thanks!!
Smooth showed the horizontal angle of view was about 100 deg for camera in portrait mode.
www.panoguide.com/forums/tipsntricks/7284/?page=4
This is the vertical angle of view for camera in landscape mode. At 0 deg tilt. The zenith and nadir hole is about 80 deg.
nick
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John Houghton
Posts: 3412
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Samyang 8mm Fisheye Canon APS-C
Posted: 27 Jul 2010 at 8:23 GMT
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enridp said: I want to cover 360H and the maximum ºV (covering the full zenith) with 3 shots. How should I put the camera in every shot?
You would simply mount the camera in landscape orientation with pitch=41 degrees. That would just manage to close the zenith hole , but it would leave a rather large nadir hole of approximately 170 degrees.
John
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